{"affected":[{"defaultStatus":"unaffected","ecosystem":"composer","packageName":"postfixadmin/postfixadmin","product":"postfixadmin","source":"CNA: VulnCheck","vendor":"postfixadmin","versions":[{"lessThanOrEqual":"4.0.5","status":"affected","version":"0","versionType":"semver"}]}],"cveId":"CVE-2026-121551","cwes":["CWE-79"],"description":"PostfixAdmin through 4.0.5 contains a stored cross-site scripting vulnerability that allows authenticated mailbox users to inject script by creating a TOTP exception with an unescaped description. When a global administrator views totp-exceptions.php, the script runs in the admin session and can issue authenticated admin requests using the page's CSRF token.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":5.1,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0"},{"score":5.4,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},{"score":5.1,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":5.4,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","version":"3.1"}],"modifiedAt":1793730475973,"publishedAt":1793719030145,"references":[{"source":"CNA: VulnCheck","tags":["issue-tracking"],"url":"https://github.com/postfixadmin/postfixadmin/issues/1185"},{"source":"CNA: VulnCheck","tags":["product"],"url":"https://github.com/postfixadmin/postfixadmin"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/postfixadmin/postfixadmin/commit/0a894b08769481ce1a7f0f42af901c6d9f88fa9c"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/postfixadmin/postfixadmin/blob/v4.0.5/public/users/totp-exceptions.php#L128"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/postfixadmin/postfixadmin/blob/v4.0.5/templates/totp-exceptions.tpl#L56"},{"source":"CNA: VulnCheck","tags":["technical-description","patch","issue-tracking"],"url":"https://github.com/postfixadmin/postfixadmin/pull/1172"},{"source":"CNA: VulnCheck","tags":["technical-description","patch","issue-tracking"],"url":"https://github.com/postfixadmin/postfixadmin/pull/1186"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/postfixadmin-through-4.0.5-stored-xss-via-totp-exception-description"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/postfixadmin/postfixadmin"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/postfixadmin/postfixadmin/blob/v4.0.5/public/users/totp-exceptions.php#L128"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/postfixadmin/postfixadmin/blob/v4.0.5/templates/totp-exceptions.tpl#L56"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/postfixadmin/postfixadmin/commit/0a894b08769481ce1a7f0f42af901c6d9f88fa9c"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/postfixadmin/postfixadmin/issues/1185"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/postfixadmin/postfixadmin/pull/1172"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/postfixadmin/postfixadmin/pull/1186"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/postfixadmin-through-4.0.5-stored-xss-via-totp-exception-description"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/postfixadmin/postfixadmin/commit/0a894b08769481ce1a7f0f42af901c6d9f88fa9c"},{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/postfixadmin/postfixadmin/pull/1172"},{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/postfixadmin/postfixadmin/pull/1186"}],"revision":"e8d0b4eb1c7c30e505a800550b82fc4732c864f8d8b50e3620c633cd86e22631","sources":[{"modifiedAt":1793730475973,"name":"CNA: VulnCheck","retrievedAt":1793733004969,"url":"https://www.cve.org/CVERecord?id=CVE-2026-121551"},{"modifiedAt":1793723417150,"name":"NVD","retrievedAt":1793730103884,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121551"}],"ssvc":{"assessedAt":1793726471734,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"PostfixAdmin through 4.0.5 Stored XSS via TOTP Exception Description","updatedAt":1793733004969}